Synthesis of Deuterated Poly ( 4-Acetoxystyrene ) by a Polymer-Analogous Reaction Sequence

2016 ◽  
Vol 2 (4) ◽  
pp. 57-64
Author(s):  
Khalifa M.
2013 ◽  
Vol 4 (6) ◽  
pp. 1848 ◽  
Author(s):  
Kerstin Thiel ◽  
Rolf Zehbe ◽  
Jerômé Roeser ◽  
Peter Strauch ◽  
Stephan Enthaler ◽  
...  

2009 ◽  
Vol 51 (8) ◽  
pp. 957-964 ◽  
Author(s):  
A. V. Chertovich ◽  
D. V. Guseva ◽  
E. N. Govorun ◽  
Ya. V. Kudryavtsev ◽  
A. D. Litmanovich

1999 ◽  
Vol 31 (11_1) ◽  
pp. 913-919 ◽  
Author(s):  
Maria Chiara Bignozzi ◽  
Sante A Angeloni ◽  
Michele Laus ◽  
Luca Incicco ◽  
Oriano Francescangeli ◽  
...  

1980 ◽  
Vol 35 (8) ◽  
pp. 1031-1034 ◽  
Author(s):  
Gernot Frenking ◽  
Jochen Schmidt ◽  
Helmut Schwarz

Abstract In agreement with experimental results MNDO calculations indicate that unimolecular CO loss from the isomeric ions CH2 = CHCH2-CO+ (1), c-C3H5-CO+ (2), and CH3CH = CH-CO+ (3), gives exclusively allyl cation (4). It is shown that, whereas CO loss from 1 is a continuously endothermic process, the analogous reaction from 2 and 3 follows relatively complicated pathways. For 2, the energetically most feasible reaction involves an isomerization of 2 to 1 via the intermediate α-oxo-and β-oxocyclobutyl cations (8) and (9). This reaction sequence is 10 kcal • mol-1 lower in energy than direct CO loss from 2 coupled with isomerization of the incipient cyclopropyl cation (7) to allyl cation (4). For 3 it is shown that this ion undergoes isomerization to 2 prior to CO loss. The alternative reaction, i.e. direct CO elimination giving rise to 1-propenyl cation (11) or isomerization to 1 were 35 and 43 kcal • mol-1 higher in energy than the process 3 → 2.


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